I just installed the plugin and tried to start using Arduino Create. I get the “No Plugin Connection. Uploading is disabled until you reconnect.” message at the top of my Create session. I have the icon in the taskbar. It is green. I can pause it, I can kill it, I can restart it. It doesn’t seem to connect to my browser.
I’m doing this on a school computer (I’m a teacher) that is managed by central IT, so I wonder if some of their security policies are interfering.